Granted Patent
Utility
US 4,971,113 · App. 07/467,856
Single-lever mixing-valve assembly
Inventors:
Manfred Pawelzik, Horst Titze
Patented Case
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Granted: Nov 20, 1990
Filed: Jan 22, 1990
Inventors
Manfred Pawelzik
Horst Titze
Assignee (at issue)
Friedrich Grohe Armaturenfabrik GmbH & Co.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.